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采用正电子湮没寿命谱方法对空间微重力及重力条件下生长的呼银汞（MCT）材料中的微观缺陷进行了研究。结果表明，在空间微重力条件下生长的MCT晶体中，其空位型缺陷浓度低于地球上有重句条件下生长的晶体，并且缺陷浓度沿轴向的分布比较均匀。
The positron annihilation lifetime spectroscopy method was used to study the microscopic defects in the silver-mercury alloy (MCT) grown under the conditions of microgravity and gravity. The results show that the concentration of vacancy defects in MCT grown under the conditions of space microgravity is lower than that of crystals grown under heavy sentences on Earth, and the distribution of defect concentration in the axial direction is relatively uniform.